Diamond Photodiodes for X-ray Applications

Journal Article · Wed Feb 10 04:00:00 EST 2010 · Materials Research Society Symposia Proceedings

OSTI ID:1040415

Smedley, J; Keister, J; Muller, E; Jordan-Sweet, J; Bohon, J; Distel, J; Dong, B

Single crystal high purity CVD diamonds have been metallized and calibrated as photodiodes at the National Synchrotron Light Source (NSLS). Current mode responsivity measurements have been made over a wide range (0.2-28 keV) of photon energies across several beamlines. Linear response has been achieved over ten orders of magnitude of incident flux, along with uniform spatial response. A simple model of responsivity has been used to describe the results, yielding a value of 13.3 {+-} 0.5 eV for the mean pair creation energy. The responsivity vs. photon energy data show a dip for photon energies near the carbon edge (284 eV), indicating incomplete charge collection for carriers created less than one micron from the metallized layer.

• Research Organization: BROOKHAVEN NATIONAL LABORATORY (BNL)
• Sponsoring Organization: USDOE SC OFFICE OF SCIENCE (SC)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 1040415
• Report Number(s): BNL--91363-2010-JA; KA-04
• Journal Information: Materials Research Society Symposia Proceedings, Journal Name: Materials Research Society Symposia Proceedings Vol. 1203; ISSN 0272-9172; ISSN MRSPDH
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CARBON
CHARGE COLLECTION
DIAMONDS
MONOCRYSTALS
NSLS
PHOTOCONDUCTIVITY
PHOTODIODES
PHOTONS